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Renewable Energy & Green Technologies

18 questions in Environment & Ecology.

Asked in 2025, 2023, 2022, 2020, 2019, 2016, 2012, 2011, 2010, 2009, 2008, 2000, 1995

2025 · Q9Environment & EcologyRenewable Energy & Green Technologieseasy

Consider the following statements : Statement I : Circular economy reduces the emissions of greenhouse gases. Statement II : Circular economy reduces the use of raw materials as inputs. Statement III : Circular economy reduces wastage in the production process. Which one of the following is correct in respect of the above statements?

  1. (a)Both Statement II and Statement III are correct and both of them explain Statement I
  2. (b)Both Statement II and Statement III are correct but only one of them explains Statement I
  3. (c)Only one of the Statements II and III is correct and that explains Statement I
  4. (d)Neither Statement II nor Statement III is correct
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Official answer(a) Both Statement II and Statement III are correct and both of them explain Statement I

2025 · Q63Environment & EcologyRenewable Energy & Green Technologiesmoderate

Consider the following statements : Statement I : Of the two major ethanol producers in the world, i.e., Brazil and the United States of America, the former produces more ethanol than the latter. Statement II : Unlike in the United States of America where corn is the principal feedstock for ethanol production, sugarcane is the principal feedstock for ethanol production in Brazil. Which one of the following is correct in respect of the above statements?

  1. (a)Both Statement I and Statement II are correct and Statement II explains Statement I
  2. (b)Both Statement I and Statement II are correct but Statement II does not explain Statement I
  3. (c)Statement I is correct but Statement II is not correct
  4. (d)Statement I is not correct but Statement II is correct
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Official answer(d) Statement I is not correct but Statement II is correct

2020 · Q78Environment & EcologyRenewable Energy & Green Technologiesmoderate

In rural road construction, the use of which of the following is preferred for ensuring environmental sustainability or to reduce carbon footprint ? 1. Copper slag 2. Cold mix asphalt technology 3. Geotextiles 4. Hot mix asphalt technology 5. Portland cement Select the correct answer using the code given below :

  1. (a)1, 2 and 3 only
  2. (b)2, 3 and 4 only
  3. (c)4 and 5 only
  4. (d)1 and 5 only
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Official answer(a) 1, 2 and 3 only

2020 · Q84Environment & EcologyRenewable Energy & Green Technologiesdifficult

According to India's National Policy on Biofuels, which of the following can be used as raw materials for the production of biofuels ? 1. Cassava 2. Damaged wheat grains 3. Groundnut seeds 4. Horse gram 5. Rotten potatoes 6. Sugar beet Select the correct answer using the code given below :

  1. (a)1, 2, 5 and 6 only
  2. (b)1, 3, 4 and 6 only
  3. (c)2, 3, 4 and 5 only
  4. (d)1, 2, 3, 4, 5 and 6
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Official answer(a) 1, 2, 5 and 6 only

2012 · Q12Environment & EcologyRenewable Energy & Green Technologiesmoderate

Biomass gasification is considered to be one of the sustainable solutions to the power crisis in India. In this context, which of the following statements is/are correct? 1. Coconut shells, groundnut shells and rice husk can be used in biomass gasification. 2. The combustible gases generated from biomass gasification consist of hydrogen and carbon dioxide only. 3. The combustible gases generated from biomass gasification can be used for direct heat generation but not in internal combustion engines. Select the correct answer using the codes given below :

  1. (a)1 only
  2. (b)2 and 3 only
  3. (c)1 and 3 only
  4. (d)1, 2 and 3
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Official answer(a) 1 only

2011 · Q1Environment & EcologyRenewable Energy & Green Technologiesmoderate

In the Union Budget 2011-12, a full exemption from the basic customs duty was extended to the bio-based asphalt (bioasphalt). What is the importance of this material? 1. Unlike traditional asphalt, bio-asphalt is not based on fossil fuels. 2. Bioasphalt can be made from non-renewable resources. 3. Bioasphalt can be made from organic waste materials. 4. It is eco-friendly to use bioasphalt for surfacing of the roads. Which of the statements given above are correct?

  1. (a)1, 2 and 3 only
  2. (b)1, 3 and 4 only
  3. (c)2 and 4 only
  4. (d)1, 2, 3 and 4
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Official answer(b) 1, 3 and 4 only

2010 · Q60Environment & EcologyRenewable Energy & Green Technologiesmoderate

Other than Jatropha curcas, why is Pongamia pinnata also considered a good option for the production of bio-diesel in India? 1. Pongamia pinnata grows naturally in most of the arid regions of India. 2. The seeds of Pongamia pinnata are rich in lipid content of which nearly half is oleic acid. Which of the statements given above is/are correct?

  1. (a)1 only
  2. (b)2 only
  3. (c)Both 1 and 2
  4. (d)Neither 1 nor 2
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Official answer(c) Both 1 and 2

2000 · Q35Environment & EcologyRenewable Energy & Green Technologiesdifficult

Match List I (Power generation plant) with List II (Feed material) and select the correct answer using the codes given below the Lists: List I I. M/s Gowthami Solvents Oil Limited, Andhra Pradesh II. M/s KM. Sugar Mills, Uttar Pradesh III. M/s Satia Paper Mills, Punjab IV. M/s Al Kabeer Exports Limited, Andhra Pradesh List II A) Rice husk B) Slaughter-house waste C) Distillery spent wash D) Black liquor Codes:

  1. (a)I-C, II-A, III-B, IV-D
  2. (b)I-C, II-A, III-D, IV-B
  3. (c)I-A, II-C, III-D, IV-B
  4. (d)I-A, II-C, III-B, IV-D
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Official answer(c) I-A, II-C, III-D, IV-B